README

Google APIs Client Library for PHP

Library maintenance

This client library is supported but in maintenance mode only. We are fixing necessary bugs and adding essential features to ensure this library continues to meet your needs for accessing Google APIs. Non-critical issues will be closed. Any issue may be reopened if it is causing ongoing problems.

Description

The Google API Client Library enables you to work with Google APIs such as Google+, Drive, or YouTube on your server.

Installation

Composer

Once composer is installed, execute the following command in your project root to install this library:

composer require google/apiclient:^2.0

Finally, be sure to include the autoloader:

require_once'/path/to/your-project/vendor/autoload.php';

Download the Release

If you abhor using composer, you can download the package in its entirety. The Releases page lists all stable versions. Download any file
with the name google-api-php-client-[RELEASE_NAME].zip for a package including this library and its dependencies.

Uncompress the zip file you download, and include the autoloader in your project:

// Your redirect URI can be any registered URI, but in this example// we redirect back to this same page$redirect_uri='http://'.$_SERVER['HTTP_HOST'] .$_SERVER['PHP_SELF'];$client->setRedirectUri($redirect_uri);

In the script handling the redirect URI, exchange the authorization code for an access token:

if (isset($_GET['code'])) {$token=$client->fetchAccessTokenWithAuthCode($_GET['code']);}

However, as each property of the JSON API has a corresponding generated class, the above code could also be written like this:

// create the datastore service class$datastore=newGoogle_Service_Datastore($client);// build the query$request=newGoogle_Service_Datastore_RunQueryRequest();$query=newGoogle_Service_Datastore_Query();// - set the order$order=newGoogle_Service_Datastore_PropertyOrder();$order->setDirection('descending');$property=newGoogle_Service_Datastore_PropertyReference();$property->setName('title');$order->setProperty($property);$query->setOrder([$order]);// - set the kinds$kind=newGoogle_Service_Datastore_KindExpression();$kind->setName('Book');$query->setKinds([$kind]);// - set the limit$query->setLimit(10);// add the query to the request and make the request$request->setQuery($query);$response=$datastore->projects->runQuery('YOUR_DATASET_ID', $request);

The method used is a matter of preference, but it will be very difficult to use this library without first understanding the JSON syntax for the API, so it is recommended to look at the APIs Explorer before using any of the services here.

Making HTTP Requests Directly

If Google Authentication is desired for external applications, or a Google API is not available yet in this library, HTTP requests can be made directly.

The authorize method returns an authorized Guzzle Client, so any request made using the client will contain the corresponding authorization.

// create the Google client$client=newGoogle_Client();/** * Set your method for authentication. Depending on the API, This could be * directly with an access token, API key, or (recommended) using * Application Default Credentials.*/$client->useApplicationDefaultCredentials();$client->addScope(Google_Service_Plus::PLUS_ME);// returns a Guzzle HTTP Client$httpClient=$client->authorize();// make an HTTP request$response=$httpClient->get('https://www.googleapis.com/plus/v1/people/me');

Caching

It is recommended to use another caching library to improve performance. This can be done by passing a PSR-6 compatible library to the client:

In this example we use StashPHP. Add this to your project with composer:

composer require tedivm/stash

Updating Tokens

When using Refresh Tokens or Service Account Credentials, it may be useful to perform some action when a new access token is granted. To do this, pass a callable to the setTokenCallback method on the client:

Debugging Your HTTP Request using Charles

It is often very useful to debug your API calls by viewing the raw HTTP request. This library supports the use of Charles Web Proxy. Download and run Charles, and then capture all HTTP traffic through Charles with the following code:

One additional step is required in Charles to view SSL requests. Go to Charles > Proxy > SSL Proxying Settings and add the domain you'd like captured. In the case of the Google APIs, this is usually *.googleapis.com.

What do I do if something isn't working?

If there is a specific bug with the library, please file a issue in the Github issues tracker, including an example of the failing code and any specific errors retrieved. Feature requests can also be filed, as long as they are core library requests, and not-API specific: for those, refer to the documentation for the individual APIs for the best place to file requests. Please try to provide a clear statement of the problem that the feature would address.

I want an example of X!

If X is a feature of the library, file away! If X is an example of using a specific service, the best place to go is to the teams for those specific APIs - our preference is to link to their examples rather than add them to the library, as they can then pin to specific versions of the library. If you have any examples for other APIs, let us know and we will happily add a link to the README above!

Why do you still support 5.2?

When we started working on the 1.0.0 branch we knew there were several fundamental issues to fix with the 0.6 releases of the library. At that time we looked at the usage of the library, and other related projects, and determined that there was still a large and active base of PHP 5.2 installs. You can see this in statistics such as the PHP versions chart in the WordPress stats: http://wordpress.org/about/stats/. We will keep looking at the types of usage we see, and try to take advantage of newer PHP features where possible.

Why does Google_..._Service have weird names?

The _Service classes are generally automatically generated from the API discovery documents: https://developers.google.com/discovery/. Sometimes new features are added to APIs with unusual names, which can cause some unexpected or non-standard style naming in the PHP classes.

How do I deal with non-JSON response types?

Some services return XML or similar by default, rather than JSON, which is what the library supports. You can request a JSON response by adding an 'alt' argument to optional params that is normally the last argument to a method call:

$opt_params = array(
'alt' => "json"
);

How do I set a field to null?

The library strips out nulls from the objects sent to the Google APIs as its the default value of all of the uninitialized properties. To work around this, set the field you want to null to Google_Model::NULL_VALUE. This is a placeholder that will be replaced with a true null when sent over the wire.

Code Quality

Run the PHPUnit tests with PHPUnit. You can configure an API key and token in BaseTest.php to run all calls, but this will require some setup on the Google Developer Console.